[META] Proposal for Changes

This issue is a meta-discussion about how to increase collaboration from others, and push the library forwards. While we usually want to avoid breaking changes, it can hinder innovation. What I'm proposing is...

• Further adopt Semantic Versioning so that breaking changes are clearer
  • Yes that means more frequent major versions, but it will be clear when a breaking change happens
• Document semantic versioning usage
• Build out the CI to build nuklear.h for us, so that git conflicts don't happen
• Further adoption of Doxygen
• Make a emscripten web-demo embedded as part of the doxygen github pages
• Automated unit testing. While we do build out the demos, would be good to have a simple script that unit tests some of the functionality
• Add another maintainer? Any volunteers?

cc @rswinkle @sleeptightAnsiC